build: support build of rook on aarch64 (AWS/graviton)
build: support build of rook on aarch64 (AWS/graviton)

Build rook in AWS/Graviton (ARM64) platform. Upon installation of
operator-sdk, make sure that the downloaded binary can actually be
executed on local machine by invoking 'operator-sdk version'.

issue: https://github.com/rook/rook/issues/8926

Signed-off-by: Shachar Sharon <b4f835f8fb3f8aa558cc3d7fb3e13b91034b92f2@redhat.com>

rook/rook,rook/rook,rook/rook,rook/rook,rook/rook